KR101250416B1 - Touch window and Fabricating method of the same - Google Patents

Abstract

The present invention relates to a touch window, wherein the touch window according to the present invention comprises a first sensing electrode pattern layer, the first sensing electrode pattern layer, and a second adhesive insulating layer bonded to one surface of a transparent window via a first adhesive iron layer. And a second sensing electrode pattern layer adhered to each other, wherein at least one first air pass hole penetrating the second sensing electrode pattern layer and the second adhesive insulating layer is formed.
According to the present invention, there is an effect of forming an air pass hole in the second adhesive disconnection layer and the second sensing pattern electrode layer on the first sensing pattern electrode layer where bubbles are generated to remove the bubbles.

Description

Touch window and its manufacturing method {Touch window and Fabricating method of the same}

The present invention relates to a method and a structure of a touch window.

The touch panel includes a cathode ray tube (CRT), a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP) and an electroluminescent device. It is installed on the display surface of an image display device such as (ELD; Electro Luminescence Device), and the user presses the touch panel while watching the image display device to input predetermined information into the computer.

1 and 2A show main components of such a capacitive touch panel. FIG. 1 shows a plan view of an adhesive structure of such a multilayer structure, and FIG. 2 shows a cross-sectional view taken along the X-ray of FIG. Referring to the drawings, the touch panel has a structure of an upper OCA 50 under the transparent window 10, an upper electrode layer 40, a lower OCA 30, and a lower electrode layer 20 below. In general, the lower portion is bonded to the liquid crystal panel (LCD) 60.

The touch screen panel (TSP) formed by the bonding of the various layers is a connection pad (P) by cutting the upper OCA 50, the upper electrode layer (ITO) 40, the lower OCA 30 for bonding with the FPCB module. ) Is provided with a bonding area (C) is exposed. However, the lower OCA 30 layer used for the adhesion of the upper electrode layer ITO 40 and the lower electrode layer 20 in the multilayer structure described above has bubbles as shown in FIG. 2B on the bonding surface with the upper electrode layer. (P) often occurs and leads to defects.

The present invention has been made to solve the above-described problems, an object of the present invention is to form a bubble by forming an air pass hole in the second adhesive loss layer and the second sensing pattern electrode layer of the upper portion of the first sensing pattern electrode layer where bubbles are generated. The present invention provides a method for removing and a structure of a touch window manufactured accordingly.

As a means for solving the above problems, the present invention is a first sensing electrode pattern layer bonded to one surface of the transparent window through the first adhesive iron layer; And a second sensing electrode pattern layer bonded through the first sensing electrode pattern layer and the second adhesive insulating layer, wherein the first air pass hole penetrates the second sensing electrode pattern layer and the second adhesive insulating layer. It is possible to provide at least one touch window is formed.

In particular, the first sensing electrode pattern layer in the above-described structure may be implemented such that at least one second air pass hole penetrating the first sensing electrode pattern layer is formed. In this case, preferably, the first and second air pass holes may be arranged to communicate with each other.

The touch window may further include an air pass line pattern formed on one surface of the second adhesive insulating layer in close contact with the second sensing electrode pattern layer or on the other surface opposite to the one surface. It is possible. In this case, when the air pass line pattern is formed on one surface and the other surface of the second adhesive insulating layer, it may be further provided with a through hole penetrating the one surface of the second adhesive insulating layer.

In addition, the touch window according to the present invention may be configured to further include a wiring part for receiving contact through the other surface opposite to one surface of the transparent window and connected to the sensing electrodes of the first and second sensing electrode pattern layers. have. In this case, the wiring part may be formed of a metal material or a transparent conductive material.

In addition, the first and second adhesive insulating layers may be OCA films, and the first and second sensing electrode pattern layers may be indium-tin oxide (ITO), indium zinc oxide (IZO), or ZnO on a base substrate. The electrode pattern may be formed of any one of (zinc oxide).

The touch window of the above-described structure, the first adhesive insulating layer film and the first sensing electrode pattern layer in which the electrode pattern is implemented by adhering and fixing on the adsorption stage, the second adhesive insulating layer to the first sensing electrode pattern layer Forming a first air path hole that passes through the same; and bonding the first sensing electrode pattern layer and the second adhesive insulating layer to the first sensing electrode pattern layer. have.

According to the present invention, there is an effect of forming an air pass hole in the second adhesive disconnection layer and the second sensing pattern electrode layer on the first sensing pattern electrode layer where bubbles are generated to remove the bubbles.

1 and 2 are a plan view and a main sectional view showing the structure of the touch window.
3 and 4 show an embodiment according to the present invention.
5 is a cross-sectional conceptual view for explaining another embodiment according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

An object of the present invention is to provide a touch window having a structure for removing bubbles generated between a plurality of layers constituting the touch screen panel (TSP).

With reference to Figures 3 and 4 will be described the principle of bubble generation in the manufacture of the touch window and the manufacturing method and configuration of the present invention for solving it.

3 is a diagram illustrating a general manufacturing method of such a touch window.

(a) First, a process of laminating a film constituting the first adhesive iron layer 50 and the first sensing electrode pattern layer 40 to be bonded to the transparent window and adsorbing the adsorption stage S is performed.

In this case, the first sensing electrode pattern layer 40 is bent into the suction stage by the suction force of the suction stage S. As shown in FIG. That is, the portion of the first adhesive iron layer 50 has a region that is patterned and cut to expose the connection pad to form the FPC bonding portion, as described in FIG. 2, in which case the first detection is performed by the tolerance of the portion. The electrode pattern layer 40 is bent downward.

Subsequently, when the second adhesive insulating layer 40 is stacked on the upper surface of the first sensing electrode pattern layer 50, an air region in which bubbles are formed is inevitably generated.

In the subsequent step (d), the second sensing electrode pattern layer 20 is stacked, and the lower plate adsorption stage S 2 is adsorbed, and as in (d), the bonding is secured through the roller R, The above-mentioned air bubbles are hardly removed and problems leading to defects are generated.

Accordingly, in the present invention through the process as shown in Figure 4 to solve the problem caused by the bubble generation.

That is, in order to solve the problem in which air is generated in the structure shown in step (b) of FIG. 3 of the present invention, the present invention provides a method of manufacturing the first adhesive insulating layer (a) in the process diagram shown in FIG. After the 50 and the first sensing pattern electrode layer 40 are bonded together, (b) a second air pass hole H1 is drilled through the first sensing pattern electrode layer 40 in which a bent portion in which air is generated is formed. The suction force in the adsorption stage S is halved to prevent the bending from being formed. Of course, it is also possible to proceed directly to step (c) without drilling the air pass hole H1.

In steps (c) to (d), the first air pass hole H2 penetrating the second adhesive insulating layer 30 and the second sensing pattern electrode layer 30 stacked on the first sensing pattern electrode layer 40 may be formed. H3) is formed, and a bend is formed in the first sensing pattern electrode layer 40 in step (b) to form a bubble movement passage upwardly so as to discharge bubbles generated to the outside.

Of course, as described above, in the case of forming the air pass hole (H1) in step (b), the suction force of the lower suction stage is reduced, so that the degree of bending of the first sensing pattern electrode layer 40 disappears remarkably. Bubbles are discharged to the outside through the first air pass holes H2 and H3 penetrating through the second adhesive insulating layer 30 and the second sensing pattern electrode layer 30 stacked on the first sensing pattern electrode layer 40. The efficiency of removal can be maximized. It is more preferable that the above-mentioned first air pass hole and the second air pass hole are arranged in a structure in which they communicate with each other.

In particular, the second adhesive material layer 30 having a structure as shown in FIG. 5 may be formed for the efficiency of the bubble removing process in addition to the above-described structure.

That is, in the present invention, the air passages of the intaglio structure, that is, the air pass line patterns Y1 and Y2 are formed on the surface of the second adhesive material layer 30 of step (b) implemented in the method of FIG. 4. When the air pass line patterns Y1 and Y2 are formed and adhered to a region where air is generated in the first sensing electrode pattern layer 40 in FIG. 3, an autoclave process is performed later. As a result, the formed bubbles are discharged to the outside along the air pass line patterns Y1 and Y2. The illustrated arrow indicates a direction in which air (bubble) exits. For this purpose, the air pass line pattern is preferably formed such that a pattern of a negative line structure extends to an end of the second adhesive insulating layer.

In particular, the air pass line patterns Y1 and Y2 are preferably formed on a surface (one surface) in which the first sensing electrode pattern layer 40 and the second adhesive pattern layer 30 are in close contact with each other. This is because the air movement path can be directly formed in the bubble-formed area and discharged to the outside.

Of course, the air path line patterns Y1 and Y2 may be formed on the other surface of the second adhesive pattern layer 30 which faces the one surface of the second adhesive pattern layer 30. In this case, the second adhesive pattern layer 30 may be used for the efficiency of air movement. At least one through hole may be formed in the groove.

Details of the touch window according to the present invention having the above-described structure may be formed of the following materials.

For example, the first sensing electrode pattern layer 40 is an electrode formed on one surface of the transparent window 100, and has excellent light transmittance and electrical conductivity indium tin oxide (ITO), indium zinc oxide (IZO), or It may be formed of a material such as zinc oxide (ZnO). The sensing electrode is used as a conductive plate for generating a capacitance change according to the contact of the human body or the like, and may be patterned into a predetermined shape for accurate determination of the number and contact position of the contact input on the transparent window. In an embodiment of the present invention, the ITO forming surface of the ITO film material formed with ITO on one surface of polyethylene resin (polyethylene terephtalete, PET) is patterned, and the patterned ITO film itself is defined as a sensing electrode pattern layer, and the sensing electrode The pattern layer may include an upper electrode layer including a first sensing electrode pattern layer 40 and a second sensing electrode pattern layer 20 which is a lower electrode layer.

In addition, when the transparent window is contacted by the contact of the user's body or the conductive object, a predetermined capacitance change occurs using the contact object and the sensing electrodes 20 and 40 as electrodes and the transparent window 110 as a dielectric. The capacitance change is measured by a control unit connected to the sensing electrode through a wiring unit (not shown), and the control unit is implemented as a mechanism for determining whether a contact occurs, the number of contact inputs and the contact position, etc. using the measured capacitance change. .

The transparent window is PET (polyethylene terephthalate), PC (polycarbonate), PES (polyether sulfone), PI (polyimide), PMMA (PolyMethly MethaAcrylate), which can be applied to high-strength materials such as glass and acrylic resin having excellent light transmittance, or flexible displays. It may be formed of a material such as. The transparent window 100 serves to maintain the appearance of the input unit of the TSP, and at least a part of the area is exposed to the outside to receive contact of a user's body or a conductive object such as a stylus pen. At this time, it is possible to selectively add a protective layer (not shown) in order to prevent damage or destruction of the transparent window due to the contact.

The display device to which the touch screen panel (TSP) is attached may be not only a liquid crystal display, but also an organic light emitting device, a plasma display panel, and the like. . In this case, in order to prevent noise components generated by driving the display device from being transmitted to the touch sensing panel (TSP) to cause a malfunction of the touch sensing panel, a shielding layer may be selectively disposed between the touch sensing panel and the display device. You can also place

The above-described sensing electrode formed on the touch window according to the present invention can be patterned into various shapes as necessary, for example, rectangular, right triangle, diamond, honeycomb, and the like. For example, a single-layer sensing electrode may be formed in a right triangle facing each other on the same plane, or the sensing electrode may be formed long in the vertical direction. In addition, as shown in FIG. 4, the first sensing electrode layer for determining a first axis (eg, X-axis) component of contact on one surface of the transparent window is patterned and adhered to the first sensing electrode layer. After forming the insulating layer, it is also possible to pattern the second sensing electrode layer for determining the second axis (eg, Y axis) component of the contact to place the sensing electrode of the two-layer structure.

In addition, the wiring unit is connected to the sensing electrode, and the wiring unit includes a screen display of the touch sensing panel (TSP) and the electronic wiring unit to which the touch sensing panel is applied to determine the number and location of the touch, and to operate the touch sensing panel. It is connected to the controlling unit. In this case, a flexible printed circuit board (FPCB) is used to cope with various mechanical shapes inside the electronic device. The circuit pattern formed on the printed circuit board may be connected to the connection pad to receive a detection signal, and determine whether or not a contact occurs and a location where the contact occurs using the received detection signal.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

10: transparent window
20: second sensing electrode pattern layer
30: second adhesive insulating layer
40: first sensing electrode pattern layer
50: first adhesive insulating layer

Claims (10)

A first sensing electrode pattern layer adhered to one surface of the adsorption stage via a first adhesive insulating layer;
And a second sensing electrode pattern layer bonded through the first sensing electrode pattern layer and the second adhesive insulating layer.
At least one first air path hole penetrating the second sensing electrode pattern layer and the second adhesive insulating layer is formed.
A touch window in which an air pass line pattern is formed on one surface of the second adhesive insulating layer in close contact with the second sensing electrode pattern layer or on the other surface of the second adhesive insulating layer.
The method according to claim 1,
The first sensing electrode pattern layer,
The touch window in which at least one second air path hole penetrating the first sensing electrode pattern layer is formed.
The method according to claim 2,
The first and second air path hole is a touch window arranged in a communication structure.
delete The method according to claim 1,
When the air pass line pattern is formed on one surface and the other surface of the second adhesive insulating layer,
And a through hole penetrating through one surface of the second adhesive insulating layer.
The method according to claim 1,
To receive contact through the other surface opposite to one surface of the adsorption stage,
The touch window further comprises a wiring portion connected to the sensing electrodes of the first and second sensing electrode pattern layers.
The method of claim 6,
The wiring part is a touch window formed of a metal material or a transparent conductive material.
The method of claim 6,
The first and second adhesive insulation layers are OCA films.
The method of claim 6,
The first and second sensing electrode pattern layers may include a touch window on which a electrode pattern is formed of any one material of indium-tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO).
Bonding the first adhesive insulating layer and the first sensing electrode pattern layer embodying the electrode pattern is fixed on the adsorption stage,
Bonding a second sensing electrode pattern layer on the first sensing electrode pattern layer via a second adhesive insulating layer;
Forming at least one first air pass hole penetrating the second sensing electrode pattern layer and the second adhesive insulating layer;
And forming an air pass line pattern on one surface of the second adhesive insulating layer that is in close contact with the second sensing electrode pattern layer or on the other surface of the second adhesive insulating layer.

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